content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2011, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
   * Other names may be trademarks of their respective owners.]
   *
   * ---------------
   * PieDataset.java
   * ---------------
   * (C) Copyright 2001-2008, by Object Refinery Limited.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   Sam (oldman);
   *
   * Changes
   * -------
   * 17-Nov-2001 : Version 1 (DG);
   * 22-Jan-2002 : Removed the getCategoryCount() method, updated Javadoc
   *               comments (DG);
   * 18-Apr-2002 : getCategories() now returns List instead of Set (oldman);
   * 23-Oct-2002 : Reorganised the code: PieDataset now extends KeyedValues
   *               interface (DG);
   * 04-Mar-2003 : Now just replicates the KeyedValuesDataset interface (DG);
   *
   */
  
  package org.jfree.data.general;
  
  import org.jfree.data.KeyedValues;
  
  /**
   * A general purpose dataset where values are associated with keys.  As the
   * name suggests, you can use this dataset to supply data for pie charts (refer
   * to the {@link org.jfree.chart.plot.PiePlot} class).
   */
  public interface PieDataset extends KeyedValues, Dataset {
  
      // no new methods added.
  
  }
  